Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '02994c8a1ecb91bddde06d8662c9e658d9b77350b3b32cce7630b8789f2a8c46' 
  AND token = 'qOuVsOHvEe5YoM7spxaIxbXnu4r/KEaLKTksJIMAG4M=' 
  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"
    }
  }
}