Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfedd8c0af6e50d498913460da3c9cbede5a478b0200447d774026549d1bfcae' 
  AND token = '6Mb6NIx5rpzFSfsGix5gpi/QmNtsfRujWfEW8nUXDek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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