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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '6d6c000ead6c05e38321d5807ed5b481319dcf0153dc7f638479fc08cd06d539' 
  AND token = 'Mig0rSX2uxbrcMSlG67ahfPCdao5+AzZBMnrmeU+MGY=' 
  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"
    }
  }
}