Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76f6060e1648a61a13f2df5858c951989e6ac7042580c8d69a2657051f06cf24' 
  AND token = 'OZnRQb0CFf3mNPhz5Fns4VOOVwkqQyzdHEKzEwaLYUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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