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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2480a9ac722cfa2da721d1c686ffe59261c973d734bee6f0250d125688d6c26d' 
  AND token = '1eHSRTQNHQ4DwDrOzdW/fL7jpxkS0Ur6BM7HVT9N0rQ=' 
  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"
    }
  }
}