Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdc1a118d6b83ca6b81bf4c7d59cb8d6e55181a26109c42c05f2cd48575ff96c' 
  AND token = '0Zz++NSvK35nbbn6owHT6liU2q0L4kQ+i1VioCGFjfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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