Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '109a412ffefc3ee4139faa42f3ef9002c73a82c74a04487b47eb488670761d9d' 
  AND token = '2u4I0JijFuuSK4gySMiM9BuBV0DLm+Im3wLIMq+J0iI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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