Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aae4923a00ca723921f29a062ae5954d80207c78f41087d0fbcb895f489c82a1' 
  AND token = 'ErNRW1bJA4V0RK6N6xMpcizd4SStkcN2DOsneSXbz74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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