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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8f2bf67e551bb54bc9e6f9926eb738156328e54169f58d1e5b0d9a49119cd48b' 
  AND token = 'RPKles35oZ6OoiAbG9RdG/7+n3pd+x0DAx0t9cy8iME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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