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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd7c5c73b4965329ea07cd355235b6cc7b5fd07c3fc1e67152536164149b8c6a6' 
  AND token = 'kTR0U0jMBrLjTJ+d6IvLhCOyxdfFYS9n5Tz7dlRHUsk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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