Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2080ca87860c97caa519ae50ef765b187d1649ff8b17a7add2c36bfae11b84a2' 
  AND token = 'hWUSWtt4PLsdXD19EWoKN2dnC752qOcJ8fVZt2YZNCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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