Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9890609725eeb39a62cb7538d829d11b36c1f9b1e9919b2eafc943108f3ef907' 
  AND token = 'QJLk9CH372dSaWmGqjf2Uf0aj9xUrUOb6z3rCJGob00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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