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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a013a7a008eb98cfbf529194d5e40d42db3b1ea69a3cfc481df7fa21ba35f009' 
  AND token = 'KTJ5/oNPz/+g0TJ8/t4uyNX6/tGznL7Y77AmdDvtijY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00151

JSON explain

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