Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fb06b24521ffc614b0a0df221e58621961523e27c2bbe0787015bed105304ec' 
  AND token = '0uI6O2Uh+o77vfZu3yT6d6KNVRxPGKw9P+nEjLAtSSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}