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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c08092483588fd37ce7205740e44c0cf5c1068e25d7ef5ae4c2b95d0d7eccd55' 
  AND token = 'KnfR7fpX5ZzEWv25JAgDgRUuCcWKM/RRfEQkFXNduTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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