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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'da5d27bc56d98e2597e0cd633a0aebe3bdbf72393cfc43ba4c65820362ea2395' 
  AND token = 'pm/1heUpgKr1SVF7Mzw9TyNNnc5gteQO+ssI25LHS+8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}