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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46b60197185e7610f93c182366cb09632c9e807e7190f10f3a047f2a4a32dcb0' 
  AND token = 'jPos0j+ynsb3iI+diyG/T4H+HSv3H7lD3WUyxBjGaN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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