Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2d5700c54d9ab840f0cb0aefbc1890b1706c53b3f952a0b5368072d10607d70' 
  AND token = 'dxpjPeY2zYQLXHHCnLrRUifQjC/VzA54cFH9y4Grieo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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