Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '4e2c14edaccfd939007dedbcab298a904db0c54efa2306485aa5eee99381257d' 
  AND token = 'fQZgznrrTjN3pHNoRyZPPsT2/EeSiPTnZVlgROK5wBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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