SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '219ca4742bafebbdd20a0c419fedc09f9fec5a50a18694456816f4bae631e790' 
  AND token = '/jFOu9ICm/dXZAY4Lc5v+vBd3qZjDyhqfmyJMbRQLtM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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