Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fb6fd169b970e2f3a2baa3351300763bb0e633d633601a23ab0c407a0612dec' 
  AND token = 'IFN4JgDyxZgg52MUViwnc3DW728Xe6NA9IjZZ0jv0ac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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