Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c8464a538b80fa8289b81a9732660ee8fb27d28e42bfe20206805c44802845f' 
  AND token = 'xrQMblJldnuh22alyt/IrGjLScA+Y+dDZEDCjHNlriI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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