Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '556fe2593ea5509deead3ee7b0c1d9f2bd790186ce8218fedae59f1d43d62741' 
  AND token = 'd3qAEhxUMdmGi4SpDEpzaf49srFlT/oy1n8F1i8ipoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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