Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed5bb959b60ff4216996991fb9cef4961357219b8150f38c91dcdc0e7dd05770' 
  AND token = '+GXancJTE+S9Em4C2w35RoDEYQObkaIswnr4+e2qxtw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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