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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '653f17a20487cebacef60e70d989e5283122c5f0a639803e1e7b4cbe35f52555' 
  AND token = 'Js3gMjf8wGQ/csiPQ0M1I9Lwdsh5wTCmTCYWtH45+TY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}