SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '09c14f0565300922e79c2afaef26602a945ee7360e1f872aba5430bbebbc1fc2' 
  AND token = 'KKePp6olAQ/EGvSlQGhtYx7pOL+wBhBDk6fPagkjPN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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