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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '34a5fc6df90094c6e7b1788a0d3d8b14d620501316c58d3ac15409901d2b834f' 
  AND token = '8pV0uTPlsI4x9emojhnfDA7sjg3Ezaxe8iUF9CrUTEg=' 
  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"
    }
  }
}