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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'db6f66993b8d8ad7014eac399eb3d04f24efd9d637635e559d33b813418ffbda' 
  AND token = 'RPRynLpPVUWfu1nglIOM6aPcLcRwa/dLjYQOxn02BX0=' 
  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"
    }
  }
}