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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '16fbf68a9bb9ca38ff96158dd4dd8e13d4920be57c9743934b04916f59bf034f' 
  AND token = 'LRnvMF8YIvQiB54J/L/83Vytbfq5kAdrwFsADqNUG2c=' 
  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"
    }
  }
}