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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd1a729244dd747557dfee9acad140114a17d2c7140180c486d02416dcfa9ac0d' 
  AND token = '3tKQ/LohpKXMr2a6YrKMMYbTSPfU0y3vtxoWbt9NebY=' 
  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"
    }
  }
}