Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f245777802994e7e28df95eba06fc6d69f778a38a2a022b8d01f420ec38503e' 
  AND token = 'jK0CLn8k4OKEQUbhNaR45W+28PE7dDy25vmD1fG6A4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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