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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '890cebb465f165cd8b887ac02b3c918f43ffec52b735abf851b9bd795d0ff793' 
  AND token = 'ur1dQNdftzPHGULxm6EqvLBvclza94BqRvWfX4OHmAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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