SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '04fa34e275c34287f2f47a49e95b259e28898935e468e8338991c04cd6235307' 
  AND token = 'ZYllJsktPjzxdox0yP2q4jC+xH98fKqGA5hmn6Yfdho=' 
  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"
    }
  }
}