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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'e4792bdd3401be757220f3e3f2f670b7b2a92f4f7c3d84838b1b478647225fe1' 
  AND token = '0rIMQ3OO7dTffbuXeJ57LTI10a2r6buFzCp1SwiyMFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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