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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '860e8682c9c32ab36bb7de048fa2865a47a9f9f09f38bf1b1589cf9cda071393' 
  AND token = '8DWLO9c90lWTnhdg/baia4yYQjgLmChkf7Ex9pMyheA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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