Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e390508f4678ad48d99550da046ca40a757ef1baeb84c8493ff9df4f18c3e1af' 
  AND token = 'I3NlRMJdNG4V+p+QS21TCKItGAg2BrM9RDjfZINkKBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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