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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2df980335bbe55fc1563ce35f3ba32480ea3b2c2628641f5b4d86e0791c67ccb' 
  AND token = 'L99HT3La0qanzLaWCgV9xEgAxIGCwyVHERqam1e16gk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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