Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '142c9ac5ac8ab212deff5e7dfbfbea0ea4e6b13250db3ace66462561b162f347' 
  AND token = 'ukXI0ik1iy6J7QU6gubnxp0yvn0RsSOz3UadrrJ1rHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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