Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '933cbecfb6ce9f8e804b38ef35a42fd08deebfda169d16b0c84567d097bc28c2' 
  AND token = 'ToKDHRC/qYH9D23W/eEKdUz053RV9uN7iExNrVIKn6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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