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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'be039dc4187b5c7f5bf8876a5009822d9e808273868faad9b7219746ba448239' 
  AND token = '2hjxUldUcHrytX5MYzFbF0Cu5Xm+QJ9bvtQFlLsh4F0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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