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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8f5b8052089bac5928476d557652309040757914f173c61b30688302767ae0ec' 
  AND token = 'DmSdaEA7/OE+1YG31Ckb0RJ5rkwFgDoo0RjnAMTX7bg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}