Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6a2ea746725ff273fac2fa3a6ed4a59627054860db52022481083c2f5e6efa7' 
  AND token = 'NmtIB6zU27LbBIMIJr0O3Ks3XQq1TFDZFfvpAS7gsrw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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