Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fde7e9ddf32aecd2d201e6eade4550f9ea0bb40fb5980c61579dee43644f5f3' 
  AND token = 'uVe1ALjrDI+3rVRhJLrGj1unJUR32avOAychm3YSvZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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