Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2dd8045306ba930a7f11150a5fee27cf73e44640e7b2d49d43ab5c18bf6f2be9' 
  AND token = 'S7QEr+j87KRuR9i0Ej9Fn6SHI6D889DaB8tzSrPD9Gw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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