SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'ee7749542932a235605b39b0b74cdc6165008694213f15015c3d46a471b260a8' 
  AND token = 'Nq9/EBfwvOjSqXUcyBWpIjPMNrZXm0iBRGPw/jqIQAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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