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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '58aae7ba93ef370a319ff0871d73b46ffbf1d1ea690d1ff43c3e586940c38596' 
  AND token = 'a8bQVIFRkC6+4gGnBSo1bv+oAifYHIT8FxKy38qTwSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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