Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3594bb4163e27be9f9ebc2ca67383c72ae679294d602f4641ad18bc8d60109d' 
  AND token = 'efhjSDb33r2KOVpuQvGmzuafh0XhHDRtSmCAYfCQHHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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