Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2541aecb31669b4672052e67ecec6874a78dfbe61f727246c997bdd90581700' 
  AND token = 'Emww5fJFqDDaF9aJY+qX8TikkZLjI5e/nrCpOLaExIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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