Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '426f695b7f6bf5f5687f06f4d0bd54f337ca04595f848043fb2a0c63705dc93b' 
  AND token = 'ZKfNpcSMonWnXG7uyza+PyCDDAR+LNBzaU4s0R/CbDg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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