Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '469b9d29bc9e649d9d1f1d8b0a29272b22f0e2f864163b68bfd660ed422ea6cb' 
  AND token = 'fgPzsCUNkKGOsOye/SkMYZ46cC23CXIL1Cu1AKEjnVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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