Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3c80e53be89de62dcefdd7a93611c5edaf056e48bb4ec28d2833de60e753a96' 
  AND token = 'Hxful1n+GOGBdqGK2zE3HjDXsYQc9B7JUfqMM6MBpFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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