SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0df55931fc3b370aaf26cd9d06dfb8fbef8cfea877db46e36f913ef4ad9203bb' 
  AND token = 'xzReJ+Zv76lsj/up42ooA/iSpJpJBhue5UaKj66qeKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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