Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e186c901f5a9500b7d0e8c764fb07a0e131fccb9294e4f771e84a5a34d002a37' 
  AND token = 'hV1bJmnhtx6n9mjf/g9cZ55tJ+LcUllLE/P+otluW7o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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