SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90905e437f27d5122ad269b6cd77302afc4b26b8b526b8243f15c03dbfc3434f' 
  AND token = 'J/9UgkriLxGpzk6Tp7klYVq+JtEw+9fz91C5/MV91/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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