Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b3a506c63020a898daaffac89dfb3a99ecc6c43046646209077d8acf82095df' 
  AND token = 'rw50Ga1iBE3CAcgTTkq5xTAbCUTmhXxxoB3gDm4FnKI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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