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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '14e4c8fc998b770d436f218919bc6d9dc47bdada5db86e0d6ec62a8127b89c98' 
  AND token = 'vgeK4h4g41DyUdpi7/PufodTJ1RUt/88ca1I1So6d8k=' 
  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"
    }
  }
}