Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ccf8201d3878315604d9f953fbc2ec9ea0f7cd2db54479ade779b3ddd93fdaa' 
  AND token = 'jXlRTcw7JyBwNAXJaTxNu9K11WKm8vnTackbSUS5hpk=' 
  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"
    }
  }
}