Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f7a8a18ee71fb4336aeaeb0f2c5f263c116ca56fd476617abf15f828cf2829fd' 
  AND token = 'XIXhKVlKliZIZRkd8XfhhmoegZbgJ54IEebemQeNdwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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