Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d32756d4d1da3ab38ddfdab90b80e92fae7d75d54eaa74ee5cd5e6644906714' 
  AND token = 'WWgU9x0zIN5r0F3v6I0NMzlK3ijDdJYzNh/k3aWJ/PE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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