Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba964ba5b69da2d600950729cc821bffab0ad0b8cbae5af61d5e96e0aeb453ac' 
  AND token = 'HFtY7VsuHsOD2wHpve5eYZEQ65kbVzj3+KrZEZC3/cw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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