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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c08ea1b9c8fb6df30c7cf7eeb0c607b8632703d4c350ef676f0f7a39c4e3f9a2' 
  AND token = '/9SIzjpoKR3a38M1L/3UNUa0HQi+g8/6HlXoEXWVK3M=' 
  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"
    }
  }
}