SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '8918b33d1867f1c98195e30c0adca1507e50221c8d433184b5b325c4c9227157' 
  AND token = '0FLnv8eOWjqVh6LtJiIs8Nw/oT7KYGhiYKirl98x34s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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