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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e096590f7b7d49abd0521d03ff32e31aff5dba486e6469a9e813b6d24c3362af' 
  AND token = 'wgCu6Sa3QVuPtajYRVPoluVg+xnCnBYH6b4oVipcfjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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