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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c7f11b972dc415d16145db70a8277836dbd1917eeef0112f0608053112a6cc6f' 
  AND token = 'dvY7eThAmhaMrqZ2L492de5GtF5authd9nwwXnat62c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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