Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '492ec35361026d6bc1172075cb888b72c431ab70de2c48e2a0fef048d6c9d17c' 
  AND token = '606F1c3vTvxJP+7sMV58Lv4XJ18AmlEoVF0+d/Qn5Rg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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