Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7121e159a5cae1e1fc2cdfbebfa35794c4c4dc5a433ced35550fe4854d85e115' 
  AND token = 'famNPGVIwboJ78TIeYHog0QW+iF7VUSMBlpydQoPl2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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