Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3e8be14b20f6a10e3651d31ec925ae9894fc6e4ef0838b0e25db50bce84d2fc' 
  AND token = '2IxH2AprKtbw+9BkS8tLhd7V/LuJmB5U+7MBtKWNAKY=' 
  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"
    }
  }
}