Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c50c88ce3b0394fb0c9bf8ac8f5d6efaf032128dacb10fb0e8bba07a227339d' 
  AND token = 'oE/1/WcqLA8IgEqGxo3l7Ht1dH7bG8cncvonayePppo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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