Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5be0a62808241ddb82b82e9b92d35381dd1b413694bc099f8aed66365b547908' 
  AND token = 'nhbjjm/pzTVGsp58tdZalnWctE75ZSVxtb2rjFsFhjo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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