Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d0f173f47741af72156a048785e5cd1b2143d8709c4d95fb8bd818108ad1ebf' 
  AND token = 'IID+wi8D3dlHwjhP3LDtDirbQxRLdO2PjjB1W2ZQQTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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