SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9110703b57e43402990a7ff9bf57ea0cec2fe169647a63f3a20c4706dc47235e' 
  AND token = 'pZ7WdjSWIcekvglz2EW9XpJNMQ+r+wyKlQYqwHg6Vew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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