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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bf3d0530c2ef60e7b6524c527ec1ee215c287807abeb7ee621481c72c08f7c0' 
  AND token = 'TYeUIJgXBZ8n97CxFgVSDuHMdR7yokEO/5T81QQx73g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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