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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd754d396468df01e662c153a7c682769d5e8c0c215c66e38a031b13cbdebf0cf' 
  AND token = 'HAs5CfDUDf4GeC99MTFuOpo+i+B7G6pPDfrVMqnaGlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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