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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '2da500b556fe00ecedf0ee1ef3cde2a8d45141da2d7641b5209d7f4c5bd26556' 
  AND token = 'GJu9VcQDgEKWNaG1kO0ky0GlpAUWqbq6WLKzNJtMklI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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