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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2250ff8ae524a6f2507a799d0e07a1fd35f4abab77ff9bfcc3da7f1ef43bc067' 
  AND token = 'Q7RsnUDeyf47CDsjy3WDgEZM/tYYDb3pII04ym7NM3o=' 
  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"
    }
  }
}