Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '416a6eb5d41208776222108776d40b6f21fa2b90d1a06216d88233c2f98eaf0e' 
  AND token = 'Apxwmf21NPgBRg3bcawFBShJai5oor1JE4VQ4ZkERIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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