SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11e072fa79946bb2e0780e8c46a7ee0a754936a532d7f14c5b4e6f66b4113d05' 
  AND token = 'LwaKmQux8rK7YK1AxJyp872Tj9BG5lQBj8tify0SRS4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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