Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3010637ff108e38f0ba937a1c0da019dfd9e71b6fb2df0e2394bcb0afb482961' 
  AND token = '7u+OXs3+P65tR6x8W35S3TM8Ok7smGzoGKLmWi8C/No=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00073

JSON explain

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