Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b6edafe03fc3a1a6de0b97e12681563cb206a16b6f98734064f530eec885854' 
  AND token = 'p4P/fc0TsthNEAQsziCu5cMlmpbuZPtrAHAxEpA+68k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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