SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32701a6ff81897775851a163b9b6a211ff9f11d155f07a1099b4691c2ac4b4b5' 
  AND token = 'uniDi6wUvv6IQF+QfyG5jvaVbPxh3poYFBOUI3TPLEM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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