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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6aac5ffbbfab0df323a5891ac1c65a8b9c06ec132a12dfcf63a1c5d30de0e9e0' 
  AND token = 'ppc2RwX7HdAlH/PomcE1mtIDMAZbFChtKVdO9aQ2L+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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