Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30da4962ade9ff795eb4f1501ec953c07c97c833db93f84c642c3ed930a8d735' 
  AND token = '+2CzMEbfbDFrmymkJL2Kfvq0IyiwGSWMU7kS17lhSb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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