Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45c22886dbdb2245f9edd42b8fbeef9ee3772d010307884d11cbba38ba0dd010' 
  AND token = 'IUFBp6EtHG3AAeuerIgIk5yUmCAs2RiaiX6i3XQA2Rk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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