Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46ba24c79a842cb5a86afa5fb888d34f2a74f38fcaaca768cb300999c6fa0cf2' 
  AND token = 'I7foRBZk7XUZ4sw1k98HzR0z3FN8DAScmIDJlCKHvMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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