Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11fd362cce509341c326063613763ea7c227a3520f5ee6d2bcbd7a911da1f99c' 
  AND token = 'Hxx4Q6ScJzGmX9FGwQSktQDtTjwiSe39EBmGQNF0SFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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