Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d56a5c89ab98166752b2f34b026e1b0e1ae41e66a8423092c3387fc9990a7bd' 
  AND token = 'p4O34PuBJxEvkBEz7ALVeV7nepB82eQXsBBpukxYfeo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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