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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ce38c5738eb98b5bb440bc97263b4abe339992ee3f111778bcdfceaac81f2533' 
  AND token = 'I+K7sBB65WlgPY0L3PcQK+ZYpQ4slWbS1Ti+e1XpOSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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