Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afa716829128eb2e341b9e73af02bf672c12d1fa4d34b33e63af56c6e5cc1e23' 
  AND token = 'Xt7C8uOC0x7JKb/HlPYy2aiaKT1CWwh4xyNCh/K4Zio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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