Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a78d58b09e02db62ca39a20de7edf76182ce8c33e93936ceea26943e3adefab3' 
  AND token = 'z+zBm90DscubPsEVMPx9AIPX9qrUytyORHh8r9yn2AM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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