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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'f481f920a2c7c9cd578405e70c7f6ca092c7ccb6ba4b21c36d73218835e9db11' 
  AND token = 'sVFn4bAWssQUK/o8Y71Pl1v6MiLo8nOq5altkjIsOwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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