SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d3a0662da06702082edfa5b96c34dec5e3df518ee1070cdf6094dc91bff5689' 
  AND token = 'TNZ4LQtgpgXlN/OYY7NkDUX6lmxFj5nASuBtV2+wYUM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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