Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da10dd81bd2ef09e3e3ac67521d2939c88a2713adf40cb1d8f3c45493ed59ccf' 
  AND token = '5o0BkjoPYlNIMc9NdmZtuLER/Qh2e9mTdfHOrh8avD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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