Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8f9ae8770c80f910d6dc5f292c42caa75fd8bc668e6f282eb2fa1445e4cad31' 
  AND token = 'k9ey17w2wC6k9cXkiq+9jaj3bLyXlWS65Umw47vcSDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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