Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d6ad575a9c06ee8921ba85d282e095e8600faf54b99b40b3f36b63e914ff4a8' 
  AND token = 'DvsaxpDi4rvZNlMFpMlqVwXTr0BFBqNsvWEISaJmRHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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