Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f4c16164ed95c65127bf9aff8023ae873191a4006056c854cf2a0fcb0017e6d' 
  AND token = 'rHj78ujYAMNGLB9voDlwshBjtcFVd5MpikucxgfSuUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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