Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b36a610c39c4c003734d23785f695b8b0bce58213145043c23afe2ecadf80617' 
  AND token = 'gkMkjYX3yrFM4LBl2dDcGISP9Mk/0OGR2AibDgPGu94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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