Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '121ad8d4cc087dae68792632e756684cf0c60d9ae294edafe3a2ac4562011a81' 
  AND token = '7WjP8jyo78oFnEvmY0DvjrPAgi/tTaZY27tauU7Fc/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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