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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '029bc6f3f204dc1a0a66784558f0b49bcddeb74ccccc6fc0806a7fbad1c4441e' 
  AND token = 'pm3ZuFd5KxUCBleHi/JQ/Dle0aFdBA8HC89ykT1y0bk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}