Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '624c6b16f29431d0f62004bc5407199635c84d43a717bd1ee24f95a95e0a0d44' 
  AND token = 'knCFXESzTapqEBaz3g9N2i9tP33oSUcQXvSJ3l95BWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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