Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f55b93989633c4a642f635d11cdc8023ed5454acf513a589f7bf10de03a6df0' 
  AND token = 'GylKQfOxaRyCX7HCtttLR7QB2fEE/ZqQLRYH4yRhm70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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