SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04a129501831624577b80c2fae4fc301f41ab381cb89563be6cedc829b358100' 
  AND token = 'ThnVDALA+JNAwnyOvsanHujJs9g/jBRc/VQ5rO9MH5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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