Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e03892f5ae887495aba90dc8711aed96165501baf30ec468ded0cf5fb2ac92d' 
  AND token = 'La0bPeAsmFBEOZXSEe+pbxmAgztnNH0ht3Y8t03dNAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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