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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'f730ead04423dee40c73f7ce4e694a761f39195d62e1d7a817d1a8d8e1a41e41' 
  AND token = 'D3XXyvT61T88a/TWEBjmiPF1Kt/jAWY4+7pYXUmL1RE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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