Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f7bd6b63c2e4f14a3ccc8003e3e7efa066622d6a1d620618e8f0b235ffaa3c60' 
  AND token = 'BatGdLqSmLIj5s2u170EZL6clQ73JbGq+7N/MiWT2DE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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