Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '888e11ab841dd1a422708ec8a2226f20334c559d19f2802920137aefd80513d5' 
  AND token = 'qFD981Az6ywMkezNcWLJ4D4uLa19a8D2CDg06gHCAHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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