Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08a80e88fe0e4fb2d7e90f2fffc27c760339e43e8674be55c8b7f6b78729731e' 
  AND token = 'jZBgqwdX29+v4MCqtR8rQSI8QvABPZL3K43sxRFPV08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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