Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bc82bc4041b1632b4baa1531a2fff9956d5f24e7a1c0486caaadf0485a38ee8' 
  AND token = 'SuvbGnZuBidkLLI6hwKtgJ32JmXAFEiQqnEs2dkmA/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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