Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d724ab4b814a0e6abc576381bf0e460987e3b674238042a6981cb62dd519304' 
  AND token = 'Ir6DScKAvZMynvoxvYjdDoKTYhyfqMjTubha4b4s0Yc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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