Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd01400ecc36507b4a140eab18d965259821053c9e62affd500c0f8c6f22be7f1' 
  AND token = '1z2eBMeAg7gTtSfLVpXP9WkZFVyzbE//AoQcv/ZhAcc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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