Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7a26c5e0605478d26e02a09eeffe5bb3fb9b91eb54abc3f0735e3886ee194b72' 
  AND token = 'dJ0UmAFT39ydEJQqbPoT5n8E1miu33hc2xpZcxO2l48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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