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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2293addcaef0e9f2a48d1328d78564f1d272b8cf7bb554031fe2079dd8f2ddd9' 
  AND token = '1Or/w92FCW2IpkX6+WgQSopCufWRWiwX5rvLS0Al0ik=' 
  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"
    }
  }
}