Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c09b8bb107c33d4ff096f012dcd1f381919023c09ed20b1ebd6086360ff2deac' 
  AND token = '8E446FpU/fZT6sDDXLO3j8EaxCjxcJ3MgvULHDfrehU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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