Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d4d1785727d144601f50c0545d74e5b0ea22e330f32373c46d8bcca744488d2' 
  AND token = 'nDkBiEDYZgkL1UcFOc8/glOrmjbposGTdYIA9UGA8mA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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