Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb771e7beb6e1150182dbfdaa93d8c18d0e15567c26ac9953595f3b4c9efa1b1' 
  AND token = 'qes61Zh0LmtcwnpsyHIEnM7jjBU6rlbVPkOJUDpm4JQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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