Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74493724226e3cb66f6a65cfc90c26b8a52dd064ae528696c65bf370b848634c' 
  AND token = 'g8FqFyZJyN8xZJFN731N+NuYRxaFHiM6gX7AWKVFdnQ=' 
  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"
    }
  }
}