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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '5db7cb72e208ba8a7eaab76f870ce85798af36fb45df954d28dc41bea5935fce' 
  AND token = 'JySNiUiaYjxx41+1RsrrH7EWr44Ye655fu1MbOV41Zk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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