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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae1e2634174f930be42ecb087b61b23cef7de1ce5676d4a0fa84b4cb88f4a952' 
  AND token = '7VAzpvXGOFYeicukJlE0htS3BXLlZ0OWpA06M9RwNE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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