Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30c420decc93dcc27c8baf3aeb922630df28de1dd489b2f3a60cbf79dc3c30d0' 
  AND token = 'lBSGIOMwAvhAQX0va+AWvD8GrD5UD/ETIc0maDV+hG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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