Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f4e096b40b7dfd97a7dd1d66b5aa12f5931465da00787e7d70132b015c83628' 
  AND token = '9RH2JF4vDfB3SWW7o0ZERP3WLXO1pSPmFa/+WI8proo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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