SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1cdd99309cd9564c28eb42de7a4a3317eb76aaf8f90af29cdb35d82e10f68ae0' 
  AND token = 'h99qnaIbRawA5Hay4KB/H6+nrQGF/x2Mg7XuJCCLu+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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