Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9677a8e7f26e97559f923650796c09f32468acac677d4781f4d72a8c45e0b9f' 
  AND token = '68X1epIfKFYqSFrGijKppaqiGqDuK8H/QmzFRXzWZO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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