Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9ee22f25e52531a2597ee62815ddce581b52902c10d3732ef294443acfbe64b' 
  AND token = 'k5BJY/UBVanI6UHCBEenmxsSTuBDIBVAyYObthke/94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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