Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c701d7562787aef4ff5ef120a73c3d32cacc4ac3c04e92406f067f246f30db5' 
  AND token = '7Z9IXG3V2kuwMIRAz68pf+L1AaveQO75gAIr4CYLid0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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