SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e22e4b372f6e7554d78dcfcd3e7388331f5e12823e3b9218c4b46497dd03a2de' 
  AND token = '7U2LyziqTQcinyLHruqIJxo5gt/KPJyvFZON6IGjXOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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