Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'abce0c6d3c5b15778ce402563a73670f60599a64900b12b065ce396e11b5e9fc' 
  AND token = 'HvlXTNslp8jWfdTygh2L9LmInr9zFpdEI4Q7r3Mr0Ag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}