Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a781ac78ed0c3551ce07b32083678f1a71b456ddcd229add851d888b9ecc405' 
  AND token = 'jMHAXo1Tr6IE6wzLptnpSgfgcm9yiutzQH+FbACta/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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