Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b9ae614720dfd29373933a31a335a3a1b16e21bbc37efdac43ebfc0a34cc4c1' 
  AND token = 'ySGOEbHeYO4bFmVRkYnSZbz45AmRsEm6yr82N+AzH4E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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