Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5e57fe105743e11ae4ca41deb0e4e7b9eec9caf38ac0a9170b00207b95e3fa6' 
  AND token = 'vxpTuwA5rr0Rpv1An2Yb/62ypNKfAIW3VS80CZ9kLEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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