Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95650385d9e6040c0dec97689ce97da27c2fd34b602ec2e07aa2bff40502d3f9' 
  AND token = 'Qy+SuYO0PaI/ssMjqnr4bS6DYKfbvIM/YN+9h3uG/nY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}