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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'fd32e3b46a932240c2695d6e718c8bb1b42ce8a21542d4bd080b28464d531223' 
  AND token = 'wT/um0Kv19QJuyRn5rWMPLuyULEJbH58e3jMnZmQK1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}