Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '75d826c833ecbd2c5a336689987eaa737174c64b05f5812e111da7edbfb088d7' 
  AND token = '8culgim6QMcgkTSy9a/Cs0y3CjvBPFQ1IG+oN2yN8bQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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