Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '644d2dad7305dfd97c9d44943ffb5f77dafaef56d8041fa5e2427d25c5f4470a' 
  AND token = '1q8p8//i6hzBr7QeXA9JcTeLvMrFB5ratYylOg35/c0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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